US341790A - Trimming device for sewing-machines - Google Patents

Description

(No Model.)

J. BIGELOW,

TRIMMING DBVIGE FOR SEWING MAGHINES. No. 341,790. Patented May 11, 1886.

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JOHN BIGELOW, or PHILADELPHIA, PENNSYLVANIA.

TRIMMING DEVICE FDR SEWlNG lViACl-HNES.

JGITEGATEGN forming part of Letters Patent No, 341,790, dated May 11, 1886.

Original application filed June 5, 1879. Divided and this application filed November 8, 1881. Serial No. 45,391. (No model.)

To all whom, it may concern:

Be itkuown that 1, JOHN BIGELOW, a eiti zen of the United States, residing a'twPhiladelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain'new and useful Improvements in Trimming Devices for SewingMaehines; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appert-ai us to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification, this application.

being a divisional application of original application filed June 5, 1879, and patented August 29, 1.882, No. 263,467.

Figure 1 is a side view of the present invention as applied to use on an American button-hole machine, so called. Fig. 2 is a like View from the opposite side.

This invention relates to trimming devices for sewing-machines, in which two shear-cutting edgesone stationary the other moving or movable are employed; and the novelty consists,more particularly, in combining with the stitch-forming mechanism of asewing machine a shear-trimmcr composed of a fixed and a movable cutter, the movable cutter being adjustable and devised to regulate the position of its cutting-edge to the sewing mechanism and to the cutting-edge of the cooperating cutter; and in combining with the stitch forming mechanism of a sewingmachine a shear-trimmer having a movablebladc or out ter and a stationary cooperating cutter, each adjustable independently of the other, so as to regulate the position of the cuttingpointrelative to the sewing mechanism, the two cutters having their edges held together by spring pressure; and in combination with the stitchi'orming mechanism of a sewing-machine and the movable cutter or blade of a trimming de' vice, a stationary cutter adj nstable lengthwise to regulate the position of its cutting-edge relative to the sewing mechanism and to the cuttingedge of the movable cutter; and in the combination, with the stitch-forming mechanism of a sewing-machine and a movable cutter, of a stationary cooperating cutter and a support below the work-plate of the sewing machine, to which support the said cutter is secured, said cutter also being adjustable lengthwise, so as to regulate the position of the said cutter to the work-plate and to the movable cutter, substantially as described.

For convenience in describing and explain ing my said invention, I have used an American button-hole overseaming and sewing machine; but it is evident that my invention can readily be applied by the exercise of merely mechanical skill to any of the ordinary sewing-machi'nes'now in use, and that the adj ustable stationary blade need not necessarily come screws which it into the slots (1. a in the lower part of said blade, and is so adjusted that it will come up through the work-plate L just far enough to secure the best results in the operation of the machine. I have now shown this as accomplished by having the upper or cutting end of blade H very slightly above the face of the plate L, and I may thus move this blade 'H, as above described, from time to time toward the cuttingedge, as may be found necessary to allow for grinding and wear in use. The upper blade, G, is mo'vably attached by means of slot (1. and a setscrew to the end F of level F, which lever rocks at F on a stud set in the part .1, by the movement of link E, which is jointed to said lever F at F at one end, and to the rocking lever D at the other end. This lever D receives a rock ing motion from cam d. 3y properly timing the movements of the upper blade with the needle-bar the two blades are open when the feeding takes place, and when closing out or trim the fabric with the descending movement of the needle-bar. A spring, K. (shown as secured at K to the plate A, and acting on the upper blade arm at K,) will serve to keep the cuttingedges together and assist in making a draw out, and cause them to have a shearing action suited to divide knit goods and other textile fabrics. The two blades can be readily adjusted to out different thicknesses of fabric or be moved out of the way, if at any time it is desirable to dispense with the cutting attachment.

In the drawings Ihave shown this machine as cutting in advance of the line of sewing, the two operations being performed almost at the same time; but I make no claim on that feature of this invention in this case, as all that is fully described and claimed in Division A of this same case.

Having thus described my invention, what I consider new, and desire to secure by'Letters Patent, is-

1. In a sewing and trimming machine, and

' in combination with the stitch-forming'mech anism thereof, a shear-trimmer comprising a fixed and movable cutter, having for its movable cutter a bar or plate provided with the cutting-edge at one end, and being adjustable lengthwise on its carrier,toregulate the position of said cutting-edge relatively to the sewing mechanism and to the cutting-edge of the co-operating cutter, substantially as described.

2. In a sewing and trimming machine, and

in combination with the stitch-forming mechanlsm thereof, a shear-trimmer having a movable cutter or blade, and a stationary co-op- 3. In asewing and trimming machine, and in combination with the stitch-forming mechanism of the sewing-machine and the movable blade or cutter of the trimming device, a stationary cutter formed of a bar or plate provided with the cutting-edge at one end, and being adjustable lengthwise, to regulate the position of said cuttingedge relatively to the sewing mechanism and to the cutting-edge of the movable cutter, said cutters having their edges held in contact with each other by spring-pressure in cutting, and thereby having a shear action suited to divide knit goods and other textile fabrics, substantially as described. v v

4. In a sewing and trimming machine, and in combination with the work-plate and stitchforming mechanism of the sewing-machine, and with the movable cutter of a shear-trimming device, a stationary co-operating cutter formed of a bar or plate and a support-below the work-plate, to which support said bar is secured, said bar having the cutting-edge at its upper end and being adjustable lengthwise, to regulate the position of said cutting-edge relatively to the work-plate and stitch-forming mechanism and to the cutting-edge of the movable cutter, substantially as described.

In testimony whereofI affix my signature in presence of two witnesses.

JOHN BIGELOVV.

\Vitnesses:

JAS. GREENWOOD, JOEL A. SEAL.

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